Résumé: A flexible and efficient use of the frequency resource
is a key challenge for future wireless technologies. The new
requirements are not satisfied by the CP-OFDM which has
motivated the research on alternative waveforms. Recently, Block-
Filtered OFDM modulation scheme has been proposed. This
waveform addresses most of the CP-OFDM’s drawbacks at
the price of a slight complexity increase of the transmitter.
The scheme is based on a filter-bank, a precoding stage that
ensures the Near Perfect Reconstruction property and a precompensation
stage which avoids filtering at the receiver. In
this paper, the filter specifications for BF-OFDM are derived
and an optimization method based on self-interference rejection
is proposed. Optimized filter shape can provide up to 70 dB
of Signal-to-Interference Ratio which justifies the Near Perfect
Reconstruction property with an enhanced spectral confinement
and no channel performance degradation.